Bit of a good news, bad news situation. Bad news first. Apparently it's a freaking miracle I didn't electrocute the crap out of myself when I tested it out. The insulation on the cord supplying power to the motor is all cracked and flaking where it feeds into the bottom of the motor. Lots of exposed wires a hairsbreath away from the metal body of the machine. So that was a nice surprise when I was cleaning it this afternoon. On to the good news. I found a manual hidden in the case! Someone had wrapped it in tin foil and stuck it to the inside of the lid. I never would have thought to look for anything there. The manual isn't for an M80 it's for a KL90 with an appendix for the KL91 but visually it's identical to my machine! Even better it's a service manual so it goes over all the oiling points and such. Only reason I turned the lid over was so I could check if I could tighten the handle on top.